It's getting real hard to find 5V pci slots to use the pchdtv in. The systems I use to decode HDTV are
all fairly modern and don't have 5V pci slots.
Is there any plan to upgrade PCHDTV to
3.3V pci or is 5V pci the end of the road?

Posted: Thu Jul 15, 2004 11:08 am

avsuser

Guest

Is 5V PCI a real requirement? I seem to remember some reports here about people using the card in 3.3V slots?

Can someone confirm/deny this? Every time I see this card mentioned in other forums someone responds saying 5V PCI is a showstopper.

If the card can operate in a 3.3V slot, the information on the WWW site should really be updated.

Posted: Thu Jul 15, 2004 4:40 pm

jpoet

Joined: 11 Nov 2003

Posts: 55

Location: Albuquerque, NM

The HD-2000 needs 5 volts to operate.

Most motherboards have slots which will provide 3.3 or 5 volts, so this limitation does not affect most people.

Some motherboards have slots which will not provide 5 volts. If all the PCI slots on your motherboard have a "seperator" near the backplane, then it will not take a card which requires 5 volts. That "seperator" prevents you from using a card unless it has an extra notch in it's PCI connector -- near the backplane.

John

Posted: Tue Nov 23, 2004 11:42 pm

mhoy

Joined: 17 Oct 2004

Posts: 1

What do the new HD3000 cards require? 5 or 3.3 v?

Posted: Wed Nov 24, 2004 7:16 am

onyxsoft

Joined: 09 Jul 2004

Posts: 11

mhoy wrote:

What do the new HD3000 cards require? 5 or 3.3 v?

5v

If your pci slot looks like this it will not plug in:

+-+
+ +
+ +
+-+
+ +
+ +
+ +
+ +
+ +
+ +
+-+

If it looks like this it should work:

+-+
+ +
+ +
+ +
+ +
+ +
+ +
+-+
+ +
+ +
+-+

Top of the above ascii art is the back of the computer. Notch near back is 3.3v, notch near front is 5v. Many PCI cards on the market today will have two notches on the card. One near the front and one near the back. These are universal cards and will work in 3.3v or 5v slots.

The HD2000 and the HD3000 are 5v only cards. They will not work in 3.3v slots.

Need help to find out if my PCI is 5v or 3.3v

Posted: Sat Dec 11, 2004 4:43 am

guest

Guest

The notch of my PCI slot is indeed near the center of the motherboard and away from the backplane of the computer.

However, I'd like to actually measure the power supply on the PCI slot. Yet I could not find the spec for the PCI pin layout.

Does anybody know which pin is the voltage supply?

Thanks and best regards.

Posted: Sat Dec 11, 2004 12:28 pm

CoolerQ

Joined: 11 Dec 2004

Posts: 9

So something this would work fine?

Thanks,
--Quentin

5v vs. 3.3v signaling & weblink with connector illustrat

Posted: Sat Dec 11, 2004 4:08 pm

guest

Guest

I have asked the PCI pin layout question last night.

Well, it turns out that the difference between 5v and 3.3v is not the power supply. Rather, it is the logical signaling determined by the motherboard.

All PCI connectors provide +3.3V, +5V, +12V, and -12V.

Please see the following webpage for detailed explanations and connector illustrations.